Not all images are equal - Different camera systems offer different types of resolution. In order to see real detail in the images you need a good resolution image sensor paired with a good quality lens. For example, as illustrated below, at the low end of the resolution scale, working with a basic 320 pixel sensor and a small or pinhole lens to improve the depth of focus, one can expect reduced image quality. This is further exacerbated especially true in low light conditions because a small or pinhole lens further restricts the amount of light allowed to reach the image sensor.
Below is an example of an image at our 1280 Pixel resolution used by a large local authority in the UK to monitor coastal erosion and to also monitor contractors onsite. The image has been scaled down to the lower resolutions used by other systems and the zoom inserts show the loss of detail to give a direct comparison.
When is IP65 not IP65 - Any system's reliability is a direct result of its design and manufacturing quality. Weak points in any system will affect the performance and this is especially true in harsh weather conditions.
Even when systems claim to be IP65, in reality they will not withstand exposure to harsh environments for very long before the system performance starts to degrade and ultimately fails.
Typical examples of this type of weakness are antenna connections, an exposed SMA connector even if gold plated will soon allow water to penetrate the RF connections and the camera system will inevitably fail as the connector starts to corrode.
All Vision-Link cables pass through IP68 glands and a Polyurethane gasket is fitted to the enclosure to ensure a watertight seal. This can prove very important especially in extreme conditions which can be seen from the image on the right where a flood monitoring camera was almost totally submerged in water during some recent flooding. The full IP65 protection allowed the camera system to continue operating and updating images where other systems would have failed.
Some systems respond quicker than others - Real time monitoring enables real time responses and having to wait hours to receive an image is very detrimental to a proactive and timely response. Some systems turn off their GSM network connection in order to achieve a longer battery life and only turn it on briefly once every few hours to check for any image requests or other GSM network traffic. The Vision Link systems are very different because through careful power management we stay connected to the network 100% of the time which allows us to deliver images back to the user within a few minutes of their request.